ASTM A269 yog ib qho qauv txheem rau cov yeeb nkab hlau austenitic uas tsis muaj qhov sib txuas thiab vuam rau cov kev pabcuam dav dav uas tiv taus xeb thiab kub qis lossis siab. ASTM A249 yog ib qho qauv txheem rau cov yeeb nkab hlau austenitic uas vuam, lub tshuab cua sov loj, lub tshuab hloov pauv cua sov, thiab cov yeeb nkab condenser. ASTM A213 yog ib qho qauv txheem rau cov yeeb nkab hlau ferritic thiab austenitic alloy-steel uas tsis muaj qhov sib txuas, lub tshuab cua sov loj, thiab cov yeeb nkab hloov pauv cua sov. Qhov sib txawv ntawm A269, A249, thiab A213 yog nyob rau hauv cov qauv tshwj xeeb uas lawv sawv cev rau cov yeeb nkab hlau tsis xeb.
TXHEEJ TXHEEM ASTMA249 ASTM A269 ASTMA270 ASTM213
| Tus Qauv | Kev kam rau sab nraud (hli) | Phab ntsa tuab (%) | Kev kam rau siab ntev (hli) | ||
| ASTM A249 | <25.0 | +0.10 -0.11 | ±10% | ||
| ≥25.0-≤40.0 | ±0.15 | ||||
| >40.0-<50.0 | ±0.20 | OD <50.8 | +3.0-0.0 | ||
| ≥50.0 ~ <65.0 | ±0.25 | ||||
| ≥65.0-<75.0 | ±0.30 | ||||
| ≥75.0 ~ <100.0 | ±0.38 | OD≥50.8 | +5.0-0.0 | ||
| ≥100 ~ ≤200.0 | +0.38 -0.64 | ||||
| >200.0-≤225.0 | +0.38 -1.14 | ||||
| ASTM A269 | <38.1 | ±0.13 | |||
| ≥38.1 ~ <88.9 | ±0.25 | ||||
| ≥88.9-<139.7 | ±0.38 | ±15.0% | Qhov siab tshaj <38.1 | +3.2-0.0 | |
| ≥139.7~<203.2 | ±0.76 | ±10.0% | 0D ≥38.1 | +4.0-0.0 | |
| ≥203.2-<304.8 | ±1.01 | ||||
| ≥304.8-<355.6 | ±1.26 | ||||
| ASTMA270 | ≤25.4 | ±0.13 | ±10% | +10-0.0 | |
| >25.4-≤50.8 | ±0.20 | ||||
| >50.8~≤62 | ±0.25 | ||||
| >76.2- ≤101.6 | ±0.38 | ||||
| >101.6~<139.7 | ±0.38 | ||||
| ≥139.7–203.2 | ±0.76 | ||||
| ≥203 2 ~ ≤304.8 | ±1.27 | ||||
| ASTM213 | D <25.4 | ± 0.10 | +20/0 | +3.0/0 | |
| 25.4~38.1 | ±0.15 | ||||
| 38.1~50.8 | ±0.20 | ||||
| 50.8~63.5 | ±0.25 | +22/0 | +5.0/0 | ||
| 63.5~76.2 | ±0.30 | ||||
| 76.2~101.6 | ±0.38 | ||||
| 101.6~190.5 | +0.38/-0.64 | ||||
| 190.5~228.6 | +0.38/-1.14 | ||||
Lub sijhawm tshaj tawm: Lub Rau Hli-27-2023